Income from Continuing Operations Before Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
U.S. income	$ 763	$ 530	$ 738
Foreign income	48	44	17
INCOME BEFORE INCOME TAXES	$ 811	$ 574	$ 755